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ISL32611EFHZ-T Fiches technique(PDF) 1 Page - Intersil Corporation

No de pièce ISL32611EFHZ-T
Description  16.5kV ESD Protected, 1.8V, Micro Power, 125째C, 1/8 Unit Load, RS-485/RS-422 Differential Receivers
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Fabricant  INTERSIL [Intersil Corporation]
Site Internet  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL32611EFHZ-T Fiches technique(HTML) 1 Page - Intersil Corporation

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±16.5kV ESD Protected, 1.8V, Micro Power, +125°C,
1/8 Unit Load, RS-485/RS-422 Differential Receivers
ISL32610E, ISL32611E, ISL32612E
The ISL32610E, ISL32611E, ISL32612E are ±16.5kV
IEC61000 ESD protected, fractional unit load (UL), 1.8V
powered, single differential receivers (Rx) for balanced (e.g.,
RS-485) data communication. With their 85µA supply
currents, these receivers are optimized for low power
applications, and deliver the lowest supply currents of any
available single Rx IC (see Figure 1).
To improve performance in low data rate applications with
slow signal transitions, these Rx feature symmetrical switching
points (±200mV) and increased hysteresis. The symmetrical
switching points eliminate the duty cycle distortion introduced
by “full-failsafe” type receivers (see Figure 2), while the larger
hysteresis increases noise immunity.
Receivers present a 1/8 “unit load” to the data bus, which
allows up to 256 devices on the network for large node count
systems (e.g., process automation, remote meter reading
systems). The ISL32611E/ISL32612E Rx output is tri-statable
via the RE/RE input.
Receiver inputs feature a “failsafe-if-open” design, which
ensures a logic high Rx output if Rx inputs are floating. Data
rates up to 256kbps are achievable with this device at
VCC =1.8V.
See Table 1 for a summary of each device’s features. For a
companion 1.8V differential transmitter in a SOT-23 package,
reference the ISL32613E data sheet.
Features
• Wide Supply Voltage Range . . . . . . . . . . . . . . . . . 1.8V to 3.6V
• Ultra Low Quiescent Supply Current . . . . . . . . . 110µA (Max.)
• IEC61000 ESD Protection on RS-485 Bus Pins . . . . ±16.5kV
- Class 3 ESD Level on all Other Pins. . . . . . . . . . >8kV HBM
• Symmetrical Switching Thresholds for Less Duty Cycle
Distortion (see Figure 2)
• Larger Hysteresis for Improved Noise Immunity . . . . . 70mV
• Data Rates up to 256kbps (1.8V) or 500kbps (3.3V)
• 1/8 Unit Load Allows up to 256 Devices on the RS-485 Bus
• Specified for +125°C Operation
• Three State Rx Output Available
•5V Tolerant Logic Inputs
• Pb-Free (RoHS Compliant)
Applications
• Industrial/Process Control Networks, Factory Automation
• High Node Count Networks
• Space Constrained Systems
• Building Environmental Control Systems
FIGURE 1. ISL3261XE REDUCES OPERATING ICC BY A FACTOR OF
4 FROM PREVIOUS GENERATION RECEIVER ICs, AND
OPERATES WITH SUPPLY VOLTAGES AS LOW AS 1.8V
FIGURE 2. COMPARED WITH A FULL-FAILSAFE RECEIVER, THE
SYMMETRICAL RX THRESHOLDS OF THE ISL3261XE
DELIVER LESS OUTPUT DUTY CYCLE DISTORTION
WHEN DRIVEN WITH SLOW INPUT SIGNALS
VCC (V)
50
500
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
ISL3261XE
ISL3282E
DYNAMIC (256kbps)
STATIC
DYNAMIC (256kbps)
STATIC
100
150
200
250
300
350
400
450
TIME (4µs/DIV)
0
4
-1
0
1
0
4
VCC = 3.3V, DATA RATE = 125kbps
ISL3261XE
ISL3282E
A-B
October 21, 2011
FN7869.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.


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